Generation and characterization of a conditional allele of Interferon Regulatory Factor 6.

Generation and characterization of a conditional allele of Interferon Regulatory Factor 6.
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DOI:
10.1002/dvg.23038
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发表时间:
2017-07
期刊:
Genesis (New York, N.Y. : 2000)
影响因子:
--
通讯作者:
Schutte BC
Schutte BC
中科院分区:
其他
文献类型:
--
作者:
Smith AL;Kousa YA;Kinoshita A;Fodor K;Yang B;Schutte BC

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干扰素调节因子 6 (IRF6) 是角质形成细胞分化、增殖和迁移的关键调节因子。 IRF6 突变会导致两种常染色体显性遗传疾病,其特征是伴有或不伴有腭裂的唇裂。此外,IRF6 的 DNA 变异会带来非综合征性唇裂和腭裂的显着风险。 IRF6 还与成人发病发育和疾病过程有关,包括乳腺发育和鳞状细胞癌。 Irf6无效等位基因纯合的小鼠在出生后不久就会因严重的皮肤、四肢和颅面缺陷而死亡,从而阻碍了出生后基因功能的研究。为了规避这个问题,生成了 Irf6 的条件等位基因。为了验证条件等位基因的功能,我们使用了三种“删除”Cre 菌株:Gdf9-Cre、CAG-Cre 和 Ella-Cre。当 Cre 表达由 Gdf9-Cre 或 CAG-Cre 转基因驱动时,如 DNA 基因分型和表型分析所示,观察到 100% 重组。相比之下,尽管在单细胞阶段表达,但使用 Ella-Cre 转基因系导致不完全重组。总之,我们生成了一种以组织特异性方式删除 Irf6 的新工具,从而可以研究围产期之后的基因功能。然而,该等位基因的重组效率由所使用的 Cre 驱动程序决定。
Interferon Regulatory Factor 6 (IRF6) is a critical regulator of differentiation, proliferation and migration of keratinocytes. Mutations in IRF6 cause two autosomal dominant disorders characterized by cleft lip with or without cleft palate. In addition, DNA variation in IRF6 confers significant risk for non-syndromic cleft lip and palate. IRF6 is also implicated in adult onset development and disease processes, including mammary gland development and squamous cell carcinoma. Mice homozygous for a null allele of Irf6 die shortly after birth due to severe skin, limb, and craniofacial defects, thus impeding the study of gene function after birth. To circumvent this, a conditional allele of Irf6 was generated. To validate the functionality of the conditional allele, we used three “deleter” Cre strains: Gdf9-Cre, CAG-Cre, and Ella-Cre. When Cre expression was driven by the Gdf9-Cre or CAG-Cre transgenes, 100% recombination was observed as indicated by DNA genotyping and phenotyping. In contrast, use of the Ella-Cre transgenic line resulted in incomplete recombination, despite expression at the one-cell stage. In sum, we generated a novel tool to delete Irf6 in a tissue specific fashion, allowing for study of gene function past perinatal stages. However, recombination efficiency of this allele was dictated by the Cre-driver used.
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